Method and device for an accelerated oxidation test of fuels or petroleum products, as well as a computer program for controlling such a device, and a corresponding computer readable storage medium

Abstract

A device and a method for an accelerated oxidation test of fuels or petroleum products, as well as a computer program for controlling such a device, and a corresponding computer readable storage medium, which are applicable, in particular, for the simulation of the aging of fuels or petroleum products. A device for an accelerated oxidation test of fuels or petroleum products is proposed, whereby the device comprises of a pressure vessel (1) to hold specimen (2) of fuels or petroleum products, and the pressure vessel (1) contains at least one device to change the temperature. A corresponding method provides that a specimen (2) of fuel or petroleum product is placed in a pressure vessel (1), the specimen is brought to a predefined temperature above 100° C. by at least one device to change the temperature, which is placed in the pressure vessel (1) and / or in the specimen (2), and the absolute pressure value is monitored so as to determine the oxidation.

Description

RELATED APPLICATION DATA[0001]The present application claims priority from prior German application 10 2005 028 896.0, filed on Jun. 27, 2005, incorporated herein by reference in its entirety.FIELD OF THE INVENTION[0002]The invention relates to a method and a device for an accelerated oxidation test of fuels or petroleum products, as well as a computer program for controlling such a device, and a corresponding computer readable storage medium, which are applicable, in particular, for the simulation of the aging of fuels or petroleum products.BACKGROUND[0003]The international standards, such as, for example, DIN 51 780 (outdated), (EN) ISO 7536 or ASTM D 525, exist for the determination of the oxidation period, for example, of fuels. These standards stipulate that a 50 ml fuel specimen is placed and sealed in a pressure vessel with specified deviations, and is charged with oxygen to a pressure of 700 kPa so as to determine the time of the pressure drop setting-in later on, which pres...

AI Technical Summary

Benefits of technology

[0023]One embodiment includes a computer readable storage medium on which a program is stored, which, upon being loaded in the memory of the data processing unit, makes it feasible for a data processing unit to execute a method for an accelerated oxidation test of fuels or petroleum products, whereby a specimen of a fuel or petroleum product is placed in a pressure vessel, and the specimen (2) is brought to a predefined temperature above 100° C. by at least one device to change the temperature, which is placed in the pressure vessel (1) and / or in the specimen (2), and the pressure in the pressure vessel (1) is monitored so as to determine the oxidation.

[0034]A special advantage of the device according to the invention for an accelerated oxidation test of fuels or petroleum products is that a very rapid change of temperature, in particular, a quick increase of temperature, is effected. This is achieved by having the device, which comprises a pressure vessel to hold the specimen of fuels or petroleum products, and the pressure vessel contains at least one device to change the temperature, whereby the pressure vessel and at least that one device to change the temperature are arranged in such a manner that the specimen is directly charged with heat. In a preferred embodiment, small thermal quantities are applied, whereby the process is accelerated further on.

Problems solved by technology

In case of present day fuels, the breaking points, under the above mentioned test conditions, typically lie around 6 . . . 8 hours, which has to be felt as very disadvantageous, if one compares these periods with those of the other laboratory tests for the dispatch release, which are mostly made within minutes.

Furthermore, there are fuels, whose additives decelerate the oxidation in such a manner that the slope described in the standard ASTM D 525 for the result sought is not achieved.

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